Superseding AD Issued for GE Engine M601 Compressor Case

The FAA is superseding Airworthiness Directive (AD) 2024-06-02 (dated April 11, 2024), which applied to several GE Aviation Czech M601 turboprop engines. Prompted by a report of a crack on the centrifugal compressor case mount pad weld area caused by poor welds, AD 2024-06-02 required a detailed visual inspection (DVI) and, if necessary, replacement of the compressor case. 

Since AD 2024-06-02 was issued, the European Union Aviation Safety Agency has issued EASA AD 2024-0194 (dated October 15, 2024), which adds repetitive DVIs at intervals not to exceed 100 flight-hours, or 300 takeoffs or 6 months, whichever occurs first. If a crack is detected, the compressor case must be replaced.  

FAA’s superseding AD 2025-18-08 includes all requirements from the EASA AD and is effective October 21, 2025.